knip

Included with Lifetime

$97 forever

Run knip to find and remove unused files, dependencies, and exports. Use for cleaning up dead code and unused dependencies.

General

What this skill does

# Knip Code Cleanup

Run knip to find and remove unused files, dependencies, and exports from this codebase.

## Setup

1. Check if knip is available:
- Run `npx knip --version` to test
- If it fails or is very slow, check if `knip` is in package.json devDependencies
- If not installed locally, install with `npm install -D knip` (or pnpm/yarn equivalent based on lockfile present)

2. If no `knip.json` or `knip.jsonc` config exists and knip reports many false positives, consider creating a minimal config based on the frameworks detected in package.json

## Execution

1. Run `npx knip` to get initial report
2. Review the output categories:
- **Unused files** - files not imported anywhere
- **Unused dependencies** - packages in package.json not imported
- **Unused devDependencies** - dev packages not used
- **Unused exports** - exported functions/variables not imported elsewhere
- **Unused types** - exported types not used

## Cleanup Strategy

### Auto-delete (high confidence):
- Unused exports that are clearly internal (not part of public API)
- Unused type exports
- Unused dependencies (remove from package.json)
- Unused files that are clearly orphaned (not entry points, not config files)

For these, proceed with deletion without asking. Use `--fix --allow-remove-files` for automated fixes, or manually delete/edit as needed.

### Ask first (needs clarification):
- Files that might be entry points or dynamically imported
- Exports that might be part of a public API (index.ts, lib exports)
- Dependencies that might be used via CLI or peer dependencies
- Anything in paths like `src/index`, `lib/`, or files with "public" or "api" in the name

Use the AskUserQuestion tool to clarify before deleting these.

## Workflow

1. Run knip, capture full output
2. Categorize each issue as auto-delete or needs-clarification
3. Ask about uncertain items in a single batch question
4. Perform all deletions (use Edit tool to remove exports, Bash to remove files/deps)
5. Re-run knip to verify cleanup is complete
6. Repeat until no issues remain or only intentionally-ignored items exist

## Common Commands

```bash
# Basic run
npx knip

# Production only (ignore test files)
npx knip --production

# Auto-fix what's safe
npx knip --fix

# Auto-fix including file deletion
npx knip --fix --allow-remove-files

# JSON output for parsing
npx knip --reporter json
```

## Notes

- If knip config exists, respect its ignore patterns
- Watch for monorepo setups - may need `--workspace` flag
- Some frameworks need plugins enabled in config
- Re-run after each batch of fixes to catch newly-exposed unused code

Files: 1

Size: 2.7 KB

Complexity: 5/100

Category: General

Source: https://github.com/artivilla/agents-config/tree/main/skills/knip

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